If no QApplication instance exists when a RisWidget is instantiated, print a warning to stderr, instantiate QApplication, and store this instance as the module level variable ris_widget.AUTO_CREATED_QAPPLICATION. Default to automatically making a newly created RisWidget visible, allowing the .show() step to be skipped, and add an argument to RisWidget.__init__ for overriding this new default behavior.
If no QApplication instance exists when a RisWidget is instantiated, print a warning to stderr, instantiate QApplication, and store this instance as the module level variable ris_widget.AUTO_CREATED_QAPPLICATION.
Default to automatically making a newly created RisWidget visible, allowing the .show() step to be skipped, and add an argument to RisWidget.__init__ for overriding this new default behavior.

zpincus/RisWidget,erikhvatum/RisWidget,erikhvatum/RisWidget,zpincus/RisWidget